Valve Core Remover Extension

ABSTRACT

This set of four assorted extensions and removing rod is designed to assist a tool used in pressurized HVAC systems having a removable valve core. The existing universal valve core removal tool is not able to access many pressurized systems. These extensions working together with the universal valve core removing tool, allow for ample clearance.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation-in-part of application Ser. No.14/072,643, filed Nov. 5, 2013 and incorporates by reference applicationSer. No. 61/796,271, filed on Nov. 6, 2012 entitled “Valve Core RemoverExtension”.

BACKGROUND OF INVENTION

In the HVAC field it has become very important, when servicing highpressurized systems, to remove and replace leaking Schrader valve cores.The EPA has a great concern on the handling and release of refrigerantgas. There is a tool presently on the market today in the HVAC fieldthat will safely remove the valve elements from pressurized airconditioning systems. This tool is called a universal valve core removaltool, but there are some issues with this tool as it is not able toaccess many ac systems due to its size.

There seemed to be a need for some improvements and so these extensionswere created in several variations to assist the existing core removertool by providing better accessibility.

SUMMARY OF THE INVENTION

These extensions that were invented are designed to work in conjunctionwith a tool on the market today. They are comprised: to attach to thevalve core removing tools first opening and the second opening to extendthe valve assembly for proper access where the existing valve coreremove tool can't access the service valve point with precision the wayit's designed to. The extensions allow the same passageways between thefirst opening and the second opening of the tools.

The extension valve tip couples to the first opening of the valveassembly, which extends the valve assembly from obstructions. Theextension sleeve's compression nut adapter is adapted to the pressurizedvalve access points, and the 4-⅛″ extension sleeve couples to the secondopening of the valve assembly tool. This allows a longer valve coreextracting rod/shaft assembly coupling to the 4-⅛″ extension sleeve,allowing the longer extracting rod/shaft assembly to move freely throughall three passageways.

FIELD OF INVENTION

This set of four extensions & removal rod is a uniquely design inventionthat can be used together with a tool presently on the market today usedfor removing valve elements from pressurized air conditioning systems.

ABSTRACT

This set of four assorted extensions and removing rod is designed toassist a tool used in pressurized HVAC systems having a removable valvecore. The existing universal valve core removal tool is not able toaccess many pressurized systems. These extensions working together withthe universal valve core removing tool, allow for ample clearance.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows the various components of the valve core extractingrod/shaft 500. The illustrated view is ready for assembly to oneanother.

FIG. 2 illustrates the preparing of the universal line service valve.

FIG. 3 illustrates the preparing of the compression nut.

FIG. 4 shows the preparation and assembly of the 4-⅛″ straight extension600.

FIG. 5 shows the preparation and assembly of the 6-⅞″ straight extension700.

FIG. 6 shows the preparation and assembly of the 2-½″ offset extension800.

FIG. 7 shows the preparation and assembly of the Ninety degree extension900.

FIG. 8 shows the extracting rod/shaft & extensions assembled to theuniversal valve assembly.

DETAILED DESCRIPTION OF DRAWINGS (FIGS. 1-8)

FIG. 0 description of materials for extracting rod/shaft.

FIG. 1 prep & assemble; extracting rod/shaft 500, apply JB weld epoxy toone end of steel cable 3 a and insert extractor head 1 a to steel cable3 a, apply JB weld to small nail 2 a, insert through small hole ofextractor head 1 a, and allow epoxy to setup. Apply JB weld ¾″ toopposite end of steel cable 3 a, insert steel cable 3 a in to ¾″×⅛″ deephole of brass rod/shaft 4 a, apply JB weld to small nail head/(ballstop) 5 a and imbed on to small hole, side of brass rod/shaft 4 a andallow epoxy to setup.

Opposite side of brass rod/shaft 4 a, insert compression nut 6 a slidingthreaded end through first. Imbed shaft control knob 7 a to brassrod/shaft 4 a, insert ⅛″ set pin 8 a through hole of shaft control knob7 a and brass rod/shaft 4 a.

FIG. 2 debraze and separate service valve 101 from copper tubediscarding copper tube. Bore through service valve 101 with ¼″ drillbit. Four service valves needed for this kit.

FIG. 3 compression nut 102 is removed from a hvac refrigerant hose. Borethrough compression nut 102 with 5/16″ drill bit carefully not damaginginner threads. Four compression nuts are needed for this kit.

FIG. 4 prep & assemble; 4-⅛″ straight extension 600. 5/16″D×3-⅛″L coppertube 103, swedge one end of copper tube 103 to ⅜″, and insertcompression nut 102 sliding threaded end through first. Swedge oppositeend of copper tube 103 to ⅜″ insert and braze service valve 101 to thisend of copper tube 103.

FIG. 5 prep & assemble; 6-⅞″ straight extension 700. 5/16″D×6-⅛″L coppertube 104; swedge one end of copper tube 104 to ⅜″, and insertcompression nut 102 sliding threaded end through first. Swedge oppositeend of copper tube 104 to ⅜″ insert and braze service valve 101 to thisend of copper tube 104.

FIG. 6 prep & assemble; 2-½″ offset extension 800. 5/16″D×2-½″L coppertube 105, bend copper tube 105 twenty degrees and swedge one end to ⅜″,and insert compression nut 102 sliding threaded end through first.Swedge opposite end of copper tube 105 to ⅜″ insert and braze servicevalve 101 to this end of copper tube 105.

FIG. 7 prep & assemble; ninety degree extension 900. 5/16″D×6-⅛″L coppertube 106; bend copper tube 106 ninety degrees and swedge one end to ⅜″,and insert compression nut 102 sliding threaded end through first.Swedge opposite end of copper tube 106 to ⅜″ insert and braze servicevalve 101 to this end of copper tube 106.

FIG. 8 Extracting rod/shaft 500, straight extension 600, and offsetextension 800 assembled to the universal valve assembly.

1. The remover rod/shaft and the extension sleeves were designed to workwith an existing tool, a Schrader valve core remover, used in the HVACindustry. I discovered issues using the existing valve core removingtool; it was not able to access the service valves on some a/c units.The tool was too large in width and the valves could not be removed. Insome cases the a/c systems cannot be pumped down due to the age of thea/c condensers, therefore the refrigerant would have to be reclaimed,the systems would have to be vacuumed and recharged. The valve coreremover extension rod/shaft and sleeves, allows the existing Schradervalve core remover to work with ease. It is a very unique and specialdesign that can be used on most HVAC systems.